Proposition 200 requires prospective voters in Arizona to provide proof of U.S. citizenship in order to register to vote, see Ariz. Rev. Stat. § 16-166(F) (the “registration provision”), and requires registered voters to show identification to cast a ballot at the polls, see Ariz. Rev. Stat. § 16-579(A) (the “polling place provision”). This appeal raises the questions whether Proposition 200 violates § 2 of the Voting Rights Act of 1965 (VRA), 42 U.S.C. § 1973, is unconstitutional under the Fourteenth or Twenty-fourth Amendments to the Constitution, or is void as inconsistent with the National Voter Registration Act of 1993 (NVRA), 42 U.S.C. §§ 1973gg et seq.

We uphold Proposition 200’s requirement that voters show identification at the polling place, but conclude that the NVRA supersedes Proposition 200’s registration provision as that provision is applied to applicants using the National Mail Voter Registration Form (the “Federal Form”) to register to vote in federal elections.